//
//  DoraemonMCViewController.m
//  DoraemonKit-DoraemonKit
//
//  Created by litianhao on 2021/7/12.
//

#import "DoraemonMCViewController.h"
#import "DoraemonQRScanView.h"
#import "DoraemonDefine.h"
#import "DoraemonMCServer.h"
#import "DoraemonMCClient.h"
#import "DoraemonAppInfoUtil.h"
#import "DoraemonManager.h"
#import "UIColor+Doraemon.h"
#import "DoraemonMultiNetWorkSerivce.h"
#import "DoraemMultiMockLogic.h"
#import "DoraemonMultiCaseListViewController.h"
#warning 去掉网络
//#import <AFNetworking/AFNetworking.h>
@interface DoraemonMCViewController ()<DoraemonQRScanDelegate>


@property (nonatomic, strong) DoraemonQRScanView *scanView;

/// 主机按钮
@property (nonatomic , strong) UIButton *masterDeviceBtn;
@property (nonatomic , strong) UIButton *masterCloseBtn;

/// 从机按钮
@property (nonatomic , strong) UIButton *assisDeviceBtn;
/// 用例采集
@property (nonatomic , strong) UIButton *caseCollectionBtn;
/// 用例上传
@property (nonatomic , strong) UIButton *caseUpLoadBtn;
/// 用例列表
@property (nonatomic , strong) UIButton *caseListBtn;



@property (nonatomic , strong) UILabel *asssisTip;

@property (nonatomic , strong) UIButton *assisDisConnectBtn;

@property (nonatomic, strong) UIImageView *qrCodeImage;

@property (nonatomic, strong) UILabel *errorLabel;

@property (nonatomic, strong) UILabel *bottomTip;

@property (nonatomic, strong) UIActivityIndicatorView *loadingView;

@property (nonatomic , strong) UIImageView *banner;

@property (nonatomic , strong) UILabel *clientCountLabel;
@end

@implementation DoraemonMCViewController

-(void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)wsDidiConnectHandle:(NSNotification *)notify {
    dispatch_async(dispatch_get_main_queue(), ^{
        self.clientCountLabel.text = [NSString stringWithFormat:@"当前连接从机数：%zd",[DoraemonMCServer connectCount]];
    });
}


- (void)viewDidLoad {
    [super viewDidLoad];
    [self refreshUI];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(refreshUI) name:DoraemonMCClientStatusChanged object:nil];
    //请求 获取全局配置
    [DoraemMultiMockLogic multiControlGetConfigRequest];

}

- (UIActivityIndicatorView *)loadingView {
    if (!_loadingView) {
        _loadingView = [[UIActivityIndicatorView alloc] init];
        _loadingView.activityIndicatorViewStyle = UIActivityIndicatorViewStyleGray;
        _loadingView.center = CGPointMake(self.view.bounds.size.width/2.0, self.view.bounds.size.height/2.0);
        [self.view addSubview:_loadingView];
        _loadingView.hidden = YES;
    }
    return _loadingView;
}

- (void)startServer {
    [self.loadingView startAnimating];
    self.loadingView.hidden = NO;
    dispatch_async(dispatch_get_global_queue(0, 0), ^{
        NSError *error = nil;
        BOOL startServerSuccess = [DoraemonMCServer startServerWithError:&error];
        dispatch_async(dispatch_get_main_queue(), ^{
            [self.loadingView stopAnimating];
            self.loadingView.hidden = YES;
            if(startServerSuccess) {
                [[DoraemonManager shareInstance] configEntryBtnBlingWithText:@"主" backColor:[UIColor doraemon_blue]];
                [DoraemonToastUtil showToastBlack:@"服务开启成功" inView:self.view];
                self.errorLabel.hidden = YES;
                self.qrCodeImage.hidden = NO;
                self.bottomTip.hidden = NO;
                [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(wsDidiConnectHandle:) name:@"com.didi.DoraemonMCServer.wsDidConnect" object:nil];
            }else {
                [[DoraemonManager shareInstance] configEntryBtnBlingWithText:nil backColor:nil];
                if (error) {
                    [DoraemonToastUtil showToastBlack:error.localizedDescription inView:self.view];
                }
                self.errorLabel.hidden = NO;
                self.qrCodeImage.hidden = YES;
                self.bottomTip.hidden = YES;
            }
            [self refreshUI];
        });

    });

}

- (DoraemonMCViewControllerWorkMode)workMode {
    if ([DoraemonMCClient isConnected]) {
        return DoraemonMCViewControllerWorkModeClient;
    }
    if ([DoraemonMCServer isOpen]) {
        return DoraemonMCViewControllerWorkModeServer;
    }
    return DoraemonMCViewControllerWorkModeNone;
}

- (UIButton *)masterDeviceBtn {
    if (!_masterDeviceBtn) {
        _masterDeviceBtn = [[UIButton alloc] initWithFrame:CGRectMake(self.view.bounds.size.width/2.0 - 50, CGRectGetMaxY(self.banner.frame) + 30, 100, 30)];
        _masterDeviceBtn.clipsToBounds = YES;
        _masterDeviceBtn.layer.cornerRadius = 5 ;
        _masterDeviceBtn.backgroundColor = [UIColor doraemon_blue];
        [_masterDeviceBtn setTitle:@"主机" forState:UIControlStateNormal];
        [_masterDeviceBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        _masterDeviceBtn.titleLabel.font = [UIFont systemFontOfSize:18];
        [self.view addSubview:_masterDeviceBtn];
        [_masterDeviceBtn addTarget:self action:@selector(masterDeviceBtnClick) forControlEvents:UIControlEventTouchUpInside];
    }
    return _masterDeviceBtn;
}

- (UIButton *)assisDisConnectBtn {
    if (!_assisDisConnectBtn) {
        _assisDisConnectBtn = [[UIButton alloc] initWithFrame:CGRectMake(self.view.bounds.size.width/2.0 - 50, CGRectGetMaxY(self.asssisTip.frame) + 30, 100, 30)];
        _assisDisConnectBtn.clipsToBounds = YES;
        _assisDisConnectBtn.layer.cornerRadius = 5 ;
        _assisDisConnectBtn.backgroundColor = [UIColor doraemon_blue];
        [_assisDisConnectBtn setTitle:@"断开连接" forState:UIControlStateNormal];
        [_assisDisConnectBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        _assisDisConnectBtn.titleLabel.font = [UIFont systemFontOfSize:18];
        [self.view addSubview:_assisDisConnectBtn];
        [_assisDisConnectBtn addTarget:self action:@selector(assisDisConnectBtnCLick) forControlEvents:UIControlEventTouchUpInside];
    }
    return _assisDisConnectBtn;
}


- (UIButton *)assisDeviceBtn {
    if (!_assisDeviceBtn) {
        _assisDeviceBtn = [[UIButton alloc] initWithFrame:CGRectMake(self.view.bounds.size.width/2.0 - 50, CGRectGetMaxY(self.masterDeviceBtn.frame) + 30, 100, 30)];
        _assisDeviceBtn.clipsToBounds = YES;
        _assisDeviceBtn.layer.cornerRadius = 5 ;
        _assisDeviceBtn.backgroundColor = [UIColor doraemon_blue];
        [_assisDeviceBtn setTitle:@"从机" forState:UIControlStateNormal];
        [_assisDeviceBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        _assisDeviceBtn.titleLabel.font = [UIFont systemFontOfSize:18];
        [self.view addSubview:_assisDeviceBtn];
        [_assisDeviceBtn addTarget:self action:@selector(assisDeviceBtnClick) forControlEvents:UIControlEventTouchUpInside];
    }
    return _assisDeviceBtn;
}

- (UIButton *)caseCollectionBtn {
    if (!_caseCollectionBtn) {
        _caseCollectionBtn = [[UIButton alloc] initWithFrame:CGRectMake(self.view.bounds.size.width/2.0 - 50, CGRectGetMaxY(self.assisDeviceBtn.frame) + 30, 100, 30)];
        _caseCollectionBtn.clipsToBounds = YES;
        _caseCollectionBtn.layer.cornerRadius = 5 ;
        _caseCollectionBtn.backgroundColor = [UIColor doraemon_blue];
        [_caseCollectionBtn setTitle:@"用例采集" forState:UIControlStateNormal];
        [_caseCollectionBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        _caseCollectionBtn.titleLabel.font = [UIFont systemFontOfSize:18];
        [self.view addSubview:_caseCollectionBtn];
        [_caseCollectionBtn addTarget:self action:@selector(startRecordBtnClick) forControlEvents:UIControlEventTouchUpInside];
    }
    return _caseCollectionBtn;
}

- (UIButton *)caseUpLoadBtn {
    if (!_caseUpLoadBtn) {
        _caseUpLoadBtn = [[UIButton alloc] initWithFrame:CGRectMake(self.view.bounds.size.width/2.0 - 50, CGRectGetMaxY(self.caseCollectionBtn.frame) + 30, 100, 30)];
        _caseUpLoadBtn.clipsToBounds = YES;
        _caseUpLoadBtn.layer.cornerRadius = 5 ;
        _caseUpLoadBtn.backgroundColor = [UIColor doraemon_blue];
        [_caseUpLoadBtn setTitle:@"用例上传" forState:UIControlStateNormal];
        [_caseUpLoadBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        _caseUpLoadBtn.titleLabel.font = [UIFont systemFontOfSize:18];
        [self.view addSubview:_caseUpLoadBtn];
        [_caseUpLoadBtn addTarget:self action:@selector(caseUpLoadBtnClick) forControlEvents:UIControlEventTouchUpInside];
    }
    return _caseUpLoadBtn;
}


- (UIButton *)caseListBtn {
    if (!_caseListBtn) {
        _caseListBtn = [[UIButton alloc] initWithFrame:CGRectMake(self.view.bounds.size.width/2.0 - 50, CGRectGetMaxY(self.caseUpLoadBtn.frame) + 30, 100, 30)];
        _caseListBtn.clipsToBounds = YES;
        _caseListBtn.layer.cornerRadius = 5 ;
        _caseListBtn.backgroundColor = [UIColor doraemon_blue];
        [_caseListBtn setTitle:@"用例列表" forState:UIControlStateNormal];
        [_caseListBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        _caseListBtn.titleLabel.font = [UIFont systemFontOfSize:18];
        [self.view addSubview:_caseListBtn];
        [_caseListBtn addTarget:self action:@selector(caseListBtnClick) forControlEvents:UIControlEventTouchUpInside];
    }
    return _caseListBtn;
}



- (void)masterDeviceBtnClick {
    [self startServer];
}


- (void)assisDeviceBtnClick {
#if TARGET_IPHONE_SIMULATOR  //模拟器
        UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"连接主机" message:@"请输入主机Ip地址,点击确定,连接主机" preferredStyle:UIAlertControllerStyleAlert];
        
        UIAlertAction *action = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
            NSString *ip = [alert textFields].firstObject.text;
            NSString *url = [NSString stringWithFormat:@"http://%@:%zd/MyWs", ip , kDoraemonMCServerPort];
            [self dealUrl:url];
        }];
        UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
        [alert addAction:action];
        [alert addAction:cancelAction];
        [alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
            textField.placeholder = @"请输入主机ip地址";
        }];
        [self presentViewController:alert animated:YES completion:nil];
#else      //真机
        DoraemonQRScanView *scaner = [[DoraemonQRScanView alloc] initWithFrame:CGRectMake(0, self.bigTitleView.doraemon_bottom, self.view.doraemon_width, self.view.doraemon_height-self.bigTitleView.doraemon_bottom)];
        scaner.delegate = self;
        scaner.showScanLine = YES;
        scaner.showBorderLine = YES;
        scaner.showCornerLine = YES;
        scaner.scanRect = CGRectMake(scaner.doraemon_width/2-kDoraemonSizeFrom750(480)/2, kDoraemonSizeFrom750(195), kDoraemonSizeFrom750(480), kDoraemonSizeFrom750(480));
        [self.view addSubview:scaner];
        self.scanView = scaner;
        [scaner startScanning];
#endif
}

- (void)assisDisConnectBtnCLick {
    [DoraemonMCClient disConnect];
    [self refreshUI];
}


- (void)masterCloseBtnClick {
    [DoraemonMCServer close];
    [[DoraemonManager shareInstance] configEntryBtnBlingWithText:nil backColor:nil];
    [self refreshUI];
}

// 开始录制
- (void)startRecordBtnClick {
    [self showStartRecordMessage];

}
// 结束录制
- (void)caseUpLoadBtnClick {
    //告警弹窗
    [self showEndRecordMessage];
    
}

//用例列表
- (void)caseListBtnClick{
    DoraemonMultiCaseListViewController  *caseListViewController = [[DoraemonMultiCaseListViewController alloc]init];
    [self.navigationController pushViewController:caseListViewController animated:YES];
    
}






- (void)endRecordWithPersonName:(NSString *)personName caseName:(NSString *)caseName {
    
    [DoraemMultiMockLogic endRecordWithPersonName:personName caseName:caseName sus:^(id  _Nonnull responseObject) {
        
    } fail:^(NSError * _Nonnull error) {
        
    }];
}

- (void)showStartRecordMessage {
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"隐私提醒" message:[NSString stringWithFormat:@"1.用例采集会实时录制并上传接口数据到dokit.cn平台,请确认是否要开启、\n 2. 请确认已在dokit.cn平台一机多控模块添加诸如token、sign等无法确认接口唯一性的exclude字段(字段作用于全部录制接口)。"] preferredStyle:UIAlertControllerStyleAlert];
    
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
    
    }];
    
    UIAlertAction *sureAction = [UIAlertAction actionWithTitle:@"开启" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        //打开网络mock
        [DoraemMultiMockLogic openMultiWorkINterceptor];
        [DoraemMultiMockLogic startRecord];
    }];
    [alertController addAction:cancelAction];
    [alertController addAction:sureAction];
    [self.navigationController presentViewController:alertController animated:YES completion:nil];
}

- (void)showEndRecordMessage{
    
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"结束前请完善以下信息" message:@"请输入主机Ip地址,点击确定,连接主机" preferredStyle:UIAlertControllerStyleAlert];
    
    UIAlertAction *action = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        NSString *caseName = [alert textFields].firstObject.text;
        NSString *personName = [alert textFields].lastObject.text;

        [self endRecordWithPersonName:personName caseName:caseName];
        
    }];
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
    [alert addAction:action];
    [alert addAction:cancelAction];
    [alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.placeholder = @"请输入用例名称";
    }];
    
    [alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.placeholder = @"请输入用例采集人";
    }];
    [self presentViewController:alert animated:YES completion:nil];
    
}


- (UIImageView *)banner {
    if (!_banner) {
        CGFloat marginTop = 100 ;
        UIImage *bannerImg =  [UIImage doraemon_xcassetImageNamed:@"dk_mc_banner"];
        CGFloat bannerHeight = 300 ;
        if (bannerImg.size.width) {
            bannerHeight = self.view.bounds.size.width * bannerImg.size.height/bannerImg.size.width;
        }
        _banner = [[UIImageView alloc] initWithFrame:CGRectMake(0, marginTop, self.view.bounds.size.width, bannerHeight)];
        _banner.image = bannerImg;
        _banner.contentMode = UIViewContentModeScaleAspectFit;
        [self.view addSubview:_banner];
    }
    return _banner;
}

- (void)refreshUI {
    self.title = @"一机多控";

    [self banner];
    
    switch ([self workMode]) {
        case DoraemonMCViewControllerWorkModeClient:
        {
            self.masterDeviceBtn.hidden = YES;
            self.qrCodeImage.hidden = YES;
            self.bottomTip.hidden = YES;
            self.errorLabel.hidden = YES;
            self.assisDisConnectBtn.hidden = NO;
            self.clientCountLabel.hidden = YES;
            self.masterCloseBtn.hidden = YES;
            self.assisDeviceBtn.hidden = YES;
            self.caseCollectionBtn.hidden = YES;
            self.caseUpLoadBtn.hidden = YES;
            self.caseListBtn.hidden = YES;
            if (self.asssisTip == nil) {
                self.asssisTip = [[UILabel alloc] initWithFrame:CGRectMake(30, CGRectGetMaxY(self.banner.frame) + 20, self.view.bounds.size.width - 60, 100)];
                self.asssisTip.font = [UIFont systemFontOfSize:15];
                self.asssisTip.numberOfLines = 0 ;
                self.asssisTip.textColor = [UIColor doraemon_blue];
                self.asssisTip.textAlignment = NSTextAlignmentCenter;
                self.asssisTip.text = @"已连接至主机";
                [self.view addSubview:self.asssisTip];
            }
            
            _assisDisConnectBtn.frame = CGRectMake(self.view.bounds.size.width/2.0 - 50, CGRectGetMaxY(self.asssisTip.frame) + 30, 100, 30);

            self.asssisTip.hidden = NO;
            break;
        }
        case DoraemonMCViewControllerWorkModeServer:
        {
            if (self.qrCodeImage == nil) {
                self.qrCodeImage = [[UIImageView alloc] initWithFrame:CGRectMake(self.view.bounds.size.width/2.0 - 100, CGRectGetMaxY(self.banner.frame) + 20, 200, 200)];
                [self.view addSubview:self.qrCodeImage];


                self.masterCloseBtn = [[UIButton alloc] initWithFrame:CGRectMake(self.view.bounds.size.width/2.0 - 50, CGRectGetMaxY(self.qrCodeImage.frame) + 30, 100, 30)];
                self.masterCloseBtn.clipsToBounds = YES;
                self.masterCloseBtn.layer.cornerRadius = 5 ;
                self.masterCloseBtn.backgroundColor = [UIColor doraemon_blue];
                [self.masterCloseBtn setTitle:@"关闭服务" forState:UIControlStateNormal];
                [self.masterCloseBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
                self.masterCloseBtn.titleLabel.font = [UIFont systemFontOfSize:18];
                [self.view addSubview:self.masterCloseBtn];
                [self.masterCloseBtn addTarget:self action:@selector(masterCloseBtnClick) forControlEvents:UIControlEventTouchUpInside];
                
                
                self.bottomTip = [[UILabel alloc] initWithFrame:CGRectMake(30, CGRectGetMaxY(self.masterCloseBtn.frame) + 20, self.view.bounds.size.width - 60, 100)];
                self.bottomTip.font = [UIFont systemFontOfSize:15];
                self.bottomTip.numberOfLines = 0 ;
                self.bottomTip.textColor = [UIColor doraemon_blue];
                self.bottomTip.textAlignment = NSTextAlignmentCenter;
                self.clientCountLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, CGRectGetMaxY(self.bottomTip.frame) + 20, self.view.bounds.size.width, 30)];
                self.clientCountLabel.textColor = [UIColor doraemon_blue];
                self.clientCountLabel.textAlignment = NSTextAlignmentCenter;
                [self.view addSubview:self.clientCountLabel];
                [self.view addSubview:self.bottomTip];
            }
            NSString *url = [NSString stringWithFormat:@"http://%@:%zd/MyWs",[DoraemonAppInfoUtil getIPAddress:YES] , kDoraemonMCServerPort];
            self.qrCodeImage.image = [self.class QRCodeFromString:url size:300];
            self.bottomTip.text = [NSString stringWithFormat: @"请用其他手机的一机多控功能扫描以上二维码,连接该机器\n连接地址:%@",url];
            self.masterDeviceBtn.hidden = YES;
            self.assisDeviceBtn.hidden = YES;
            self.caseCollectionBtn.hidden = YES;
            self.caseUpLoadBtn.hidden = YES;
            self.caseListBtn.hidden = YES;
            self.qrCodeImage.hidden = NO;
            self.bottomTip.hidden = NO;
            self.errorLabel.hidden = YES;
            self.clientCountLabel.hidden = NO;
            self.clientCountLabel.frame = CGRectMake(0, CGRectGetMaxY(self.bottomTip.frame) + 20, self.view.bounds.size.width, 30);
            self.clientCountLabel.text = [NSString stringWithFormat:@"当前连接从机数：%zd",[DoraemonMCServer connectCount]];
            self.assisDisConnectBtn.hidden = YES;
            self.masterCloseBtn.hidden = NO;
            self.asssisTip.hidden = YES;
            break;
        }
        case DoraemonMCViewControllerWorkModeNone:
        {
            self.masterDeviceBtn.hidden = NO;
            self.assisDeviceBtn.hidden = NO;
            self.caseCollectionBtn.hidden = NO;
            self.caseUpLoadBtn.hidden = NO;
            self.caseListBtn.hidden = NO;
            self.assisDisConnectBtn.hidden = YES;
            self.qrCodeImage.hidden = YES;
            self.bottomTip.hidden = YES;
            self.errorLabel.hidden = YES;
            self.clientCountLabel.hidden = YES;
            self.masterCloseBtn.hidden = YES;
            self.asssisTip.hidden = YES;
            break;
        }
        default:
            break;
    }
}


- (UILabel *)errorLabel {
    if (!_errorLabel) {
        _errorLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, CGRectGetMaxY(self.banner.frame) + 20, self.view.bounds.size.width, 30)];
        _errorLabel.font = [UIFont systemFontOfSize:15];
        _errorLabel.textAlignment = NSTextAlignmentCenter;
        _errorLabel.text = @"服务开启失败,点击重试";
        _errorLabel.textColor = [UIColor doraemon_blue];
        UITapGestureRecognizer *tapGes = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(errorLabelDidTap)];
        _errorLabel.userInteractionEnabled = YES;
        [_errorLabel addGestureRecognizer:tapGes];
        [self.view addSubview:_errorLabel];
        _errorLabel.hidden = YES;
    }
    return _errorLabel;
}

- (void)errorLabelDidTap {
    [self startServer];
}


- (void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    [self removeScanView];
}

- (void)removeScanView{
    if (self.scanView) {
        [self.scanView stopScanning];
        [self.scanView removeFromSuperview];
        self.scanView = nil;
    }
}

- (void)dealUrl:(NSString *)URL{
    [DoraemonMCClient connectWithUrl:URL];
}

- (BOOL)needBigTitleView{
    return YES;
}

#pragma mark -- DoraemonQRScanDelegate
- (void)scanView:(DoraemonQRScanView *)scanView pickUpMessage:(NSString *)message{
    if(message.length>0){
        [self dealUrl:message];
    }
}

- (void)scanView:(DoraemonQRScanView *)scanView aroundBrightness:(NSString *)brightnessValue{
    
}


/**
*  根据字符串生成二维码图片
*
*  @param code 二维码code
*  @param size 生成图片大小
*
*  @return image
*/
+ (UIImage *)QRCodeFromString:(NSString *)code size:(CGFloat)size{
    //创建CIFilter 指定filter的名称为CIQRCodeGenerator
    CIFilter *filter = [CIFilter filterWithName:@"CIQRCodeGenerator"];
    //指定二维码的inputMessage,即你要生成二维码的字符串
    [filter setValue:[code dataUsingEncoding:NSUTF8StringEncoding] forKey:@"inputMessage"];
    //输出CIImage
    CIImage *ciImage = [filter outputImage];
    //对CIImage进行处理
    return [self createfNonInterpolatedImageFromCIImage:ciImage withSize:size];
}

/**
 *  对CIQRCodeGenerator 生成的CIImage对象进行不插值放大或缩小处理
 *
 *  @param iamge 原CIImage对象
 *  @param size  处理后的图片大小
 *
 *  @return image
 */
+ (UIImage *) createfNonInterpolatedImageFromCIImage:(CIImage *)iamge withSize:(CGFloat)size{
    CGRect extent = iamge.extent;
    CGFloat scale = MIN(size/CGRectGetWidth(extent), size/CGRectGetHeight(extent));
    size_t with = scale * CGRectGetWidth(extent);
    size_t height = scale * CGRectGetHeight(extent);
    
    UIGraphicsBeginImageContext(CGSizeMake(with, height));
    CGContextRef bitmapContextRef = UIGraphicsGetCurrentContext();
    
    CIContext *context = [CIContext contextWithOptions:nil];
    //通过CIContext 将CIImage生成CGImageRef
    CGImageRef bitmapImage = [context createCGImage:iamge fromRect:extent];
    //在对二维码放大或缩小处理时,禁止插值
    CGContextSetInterpolationQuality(bitmapContextRef, kCGInterpolationNone);
    //对二维码进行缩放
    CGContextScaleCTM(bitmapContextRef, scale, scale);
    //将二维码绘制到图片上下文
    CGContextDrawImage(bitmapContextRef, extent, bitmapImage);
    //获得上下文中二维码
    UIImage *retVal =  UIGraphicsGetImageFromCurrentImageContext();
    CGImageRelease(bitmapImage);
    CGContextRelease(bitmapContextRef);
    return retVal;
}
@end
